document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1196432>Question 1196432</A>: <I><SPAN STYLE=\"word-break: break-all;\"> From the helicopter 3000 ft. directly over one base of a <BR>\n" );
document.write( "mountain the angle of depression to the base on the other side is <BR>\n" );
document.write( "49 degrees 12 minutes. How long a tunnel is needed to go through the mountain? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #829262 by </B><A HREF=/tutors/aboutme.mpl?userid=amoresroy><B>amoresroy(361)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=amoresroy><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=amoresroy><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=829262\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Given:<BR>\n" );
document.write( "Angle of depression = 49 degrees 12 minutes = 49.2 ⁰ ( given 60 minutes/degree)<BR>\n" );
document.write( "Height of triangle is 3,000 meters\r<BR>\n" );
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document.write( "Let L = the length of a tunnel that is needed to go through the mountain.\r<BR>\n" );
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document.write( "Since L is perpendicular to the height, we have\r<BR>\n" );
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document.write( "Equation:<BR>\n" );
document.write( "Tan (49.2) = 3,000/L<BR>\n" );
document.write( "L = 3,000/Tan (49.2)<BR>\n" );
document.write( "L = 3,000/1.1585<BR>\n" );
document.write( "L = 2,589.6 \r<BR>\n" );
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document.write( "Answer\r<BR>\n" );
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document.write( "The length of a tunnel that is needed to go through the mountain is 2,589.6 feet.<BR>\n" );
document.write( " </SPAN>\n" );
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